Incomplete Conquest and Initial Unfaithfulness
Judges 1 - Judges 3:6
Israel fails to fully dispossess the Canaanites and begins to intermarry and worship foreign gods, breaking covenant with the Lord. The stage is set for the cyclical pattern of apostasy and judgment that will govern the entire period of the judges.
Establishes the theological cause: covenantal unfaithfulness and rejection of God's direct command create the conditions for all subsequent cycles of oppression and deliverance.